hbase-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Andrew Purtell <apurt...@yahoo.com>
Subject Re: Building an Hadoop & Hbase Cluster
Date Mon, 15 Dec 2008 13:11:48 GMT
Hi Wesley,

I follow your logic and would agree except that the NameNode
on a busy cluster can really become overloaded dealing with
replication, etc. so it is best to run as few services on the
NameNode as possible.

   - Andy

> From: Wesley Chow <wes.chow@s7labs.com>
> Subject: Re: Building an Hadoop & Hbase Cluster
> To: hbase-user@hadoop.apache.org
> Date: Sunday, December 14, 2008, 9:13 AM
> >> 3. Can I run the NameNode and the HBaseMaster on
> the same machine?
> > 
> 
> > 3. No, that would make 2 SPOFs at the same place. (but
> we are currently
> > integrating Zookeeper in HBase so the HMaster SPOF
> will be fixed hopefully
> > in 0.20)
> 
> Isn't it the case that if the NN goes down then HBase
> doesn't function properly? If so, then from the
> perspective of HBase reliability, you'd want to have the
> HBaseMaster on the same machine as NN, because that would
> make a single machine a point of failure, whereas having
> them on separate machines would mean you'd have 2
> machines that are each single point of failures.
> 
> Wes


      

Mime
View raw message